re PR fortran/66575 (Endless compilation on missing end interface)

2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/66575
	* decl.c (match_procedure_interface): Exit loop if procedure
	interface refers to itself.

	* gfortran.dg: pr65575.f90: New test.

From-SVN: r237994

gcc/fortran/ChangeLog

 2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/66575
+	* decl.c (match_procedure_interface): Exit loop if procedure
+	interface refers to itself.
+
+2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 	    Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/35849

gcc/fortran/decl.c

@@ -5454,7 +5454,8 @@ match_procedure_interface (gfc_symbol **proc_if)
       /* Resolve interface if possible. That way, attr.procedure is only set
 	 if it is declared by a later procedure-declaration-stmt, which is
 	 invalid per F08:C1216 (cf. resolve_procedure_interface).  */
-      while ((*proc_if)->ts.interface)
+      while ((*proc_if)->ts.interface
+	     && *proc_if != (*proc_if)->ts.interface)
 	*proc_if = (*proc_if)->ts.interface;
 
       if ((*proc_if)->attr.flavor == FL_UNKNOWN

gcc/testsuite/ChangeLog

 2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
+	PR fortran/65575
+	* gfortran.dg: pr65575.f90: New test.
+
+2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
 	PR fortran/35849
 	* gfortran.dg: pr35849.f90: New test.
 

gcc/testsuite/gfortran.dg/pr66575.f90

+! { dg-do compile }
+! Bug 66575 - Endless compilation on missing end interface 
+program p
+   procedure(g) :: g ! { dg-error "may not be used as its own interface" }
+   procedure(g) ! { dg-error "Syntax error in PROCEDURE statement" }
+end